void clear_tasks_mm_cpumask(int cpu);
int cpu_down(unsigned int cpu);
-#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
-extern void cpu_hotplug_driver_lock(void);
-extern void cpu_hotplug_driver_unlock(void);
-#else
-static inline void cpu_hotplug_driver_lock(void)
-{
-}
-
-static inline void cpu_hotplug_driver_unlock(void)
-{
-}
-#endif
-
#else /* CONFIG_HOTPLUG_CPU */
static inline void cpu_hotplug_begin(void) {}